The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.

The best science is done with both hands dirty and minds clear.

最大的风险就是不冒险。

一本好书应该让你在读完时略感疲惫。你在阅读时已经活了好几辈子。